Judson bice and andbew steigee



Nl-TED TAT-ES J UDSON RICE AND ANDBEVV STEIGER, OF SAN J OSE, AND ISAAC L. THURBER, OF SANTA CRUZ, CALIFORNIA.

ASPHALTIC TILING AND PAVING MATERIA L.

SPECIFICATION forming part of Letters Patent No. 322,970, dated July 28, 1885.

Application filed October 2, 1884. (No specimens.)

To all whom it may concern: Be it known that we, JUDSON RICE an ANDREW Srnronn, residing at the city of San J os, county of Santa Clara, and ISAAC LANE THURBER, residing at thecity and county of Santa Cruz, all in the State of California, have invented a new, useful, and Improved Asphaltic liling and Paving Material; and we declare the following to be a specification.

Tiling is used for floors, vestibules, and walks, and, when the tile are increased in size, for paving sidewalks and streets.

Heretofore tiling has been made with Portland cement as the principal ingredient, but the composition is expensive. Clay has been used to make an articleknown as terra cotta. Marble and natural sandstone have also been used for the purpose of paving sidewalks, vestibules, and walks, but all are expensive, and are liable to crack and break under a light pressure.

article for the purpose for which cement, clay,

The object of our invention is to make an stone, and marble are now used for paving and tiling of a much cheaper material and more durable than either, and that will resist press ure without breaking.

To carry out our invention we take asphaltum, which is found in large quantities in California, and form it into the material herein described.

We have discovered that asphaltum in its native state obtainsa surface that is hard, smooth, durable, and elastic; but previous to our invention of the process for working and using asphaltum it has had little or no commercial value for the purposes stated. We take the native asphaltum after it has been softened by our process for preparing and working asphaltum, (for which application for Letters Patent has been filed by us in the Patent Office of the United States) and after it is in a plastic state we subject it to a pressure in a suitable mold of any desired form, thus forming the tiling and paving material.

When the asphaltum is in its plastic state coloring-matter may be mixed with it, and clean sand, if necessary, to give it the proper consistency.

The pressure used may be varied according to the quality of the asphaltum, but the pressure removes all the water which may be in it and any other liquid substance, and gives it a smooth and polished surface.

The tiling thus formed is composed only of native asphaltum, sand, and coloring material.

We are aware that English Patent No. 3,27 5 of 187 8 describes the pulverizing of native asphalt and its subjection without heat to pressure in molds to form blocks, tiles, or slabs of compressed asphalt. To do not claim the material thus produced, it not being of our inveution; nor do we claim melted uncompressed asphalt, nor unmelted compressed asphalt, nor asphalt mixed with sawdust, nor mixtures in which asphalt is used to hold clinkers and cinders together, nor mixtures in which sand predominates over asphalt; but

What we do claim is- A tiling or roofing material consisting of 

